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TROUBLESHOOTING
Problem
Possible Cause
Corrective Action
A. Little or no
discharge
1. Casing not initially filled with water
1. Fill pump casing
2. Vertical lift too high, or too long
2. Move pump closer to water source
3. Hole or air leak in inlet line
3. Repair or replace inlet line. Use
thread tape and pipe sealing
compound
4. Foot valve too small
4. Match foot valve to piping or install
one size larger foot valve.
5. Foot valve or inlet line not
submerged deep enough in water
5. Submerge foot valve lower in water
6. Motor wired incorrectly
6. Check wiring diagram
7. Inlet or outlet line valves closed
7. Open valves
B. Pump will not
deliver water
or develop
pressure
1. No priming water in casing
1. Fill pump casing
2. Leak in inlet line
2. Repair or replace
3. Outlet line is closed and priming air
has nowhere to go
3. Open ball valve
4. Inlet line (or valve) is closed
4. Open line or valve
5. Foot valve is leaking
5. Replace foot valve
6. Inlet screen clogged
6. Clean or replace inlet screen
C. Loss of
suction
1. Hole or air leak in inlet line
1. Repair or replace inlet line. Use
thread tape and pipe sealing
compound
2. Vertical lift too high
2. Reduce vertical lift, install foot valve
and prime
3. Insufficient inlet pressure or suction
head
3. Increase inlet pressure by adding
more water to tank or increasing back
pressure
4. Clogged foot valve or strainer
4. Inspect foot valve and/or strainer for
debris, and remove
D. Pump
vibrates and/
or makes
excessive
noise
1. Mounting plate or foundation not
rigid enough
1. Reinforce plate or foundation
2. Foreign material in pump
2. Disassemble pump and clean
3. Impeller damaged
3. Replace impeller
E. Pump will not
start or run
1. Motor wired incorrectly
1. Check wiring diagram
2. Blown fuse or open circuit breaker
2. Replace fuse or close circuit breaker
3. Loose or broken wiring
3. Tighten connections, replace broken
wiring
4. Stone or foreign object lodged in
impeller
4. Disassemble pump and remove
foreign object
5. Motor overheated
5. Allow unit to cool, restart after cooling
F. Pump loses
prime.
1. Clogged foot valve or strainer
1. Inspect foot valve and/or strainer for
debris, and remove.
2. Worn or broken foot valve
2. Inspect and replace
3. Hole or air leak in inlet line
3. Repair or replace inlet line. Use
thread tape and pipe sealing
compound
